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首页> 外文期刊>Review of Scientific Instruments >Accurate measurements of water vapor transmission through high-performance barrier layers
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Accurate measurements of water vapor transmission through high-performance barrier layers

机译:准确测量通过高性能阻隔层的水蒸气传输

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摘要

We report a new approach to measuring very low rates of water vapor transmission through high-performance barrier layers, based on detection of the water vapor by cavity ring-down infrared spectroscopy. It provides accurate and traceable measurements with a detection limit for water vapor transmission significantly below 1 × 10-4 g/m2/day. The system is underpinned by dynamic reference standards of water vapor generated between 5 and 2000 nmol/mol with an estimated relative expanded uncertainty of ±2%. It has been compared with other methods and demonstrates good comparability.
机译:我们报告了一种新的方法,该方法可基于通过腔衰荡红外光谱检测水蒸气来测量通过高性能阻隔层的极低水蒸气透过率。它提供了准确且可追溯的测量结果,并且水蒸气透过率的检测极限明显低于1×10 -4 g / m 2 /天。该系统以5到2000 nmol / mol之间产生的水蒸气的动态参考标准为基础,估计的相对扩展不确定度为±2%。它已与其他方法进行了比较,并显示出良好的可比性。

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